Wrench.



J. J. AESGHLIMANN.

WRENCH.

APPLICATION FILED NOV. 12, 1912.

Patented Sept. 16, 1913.

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WRENCH.

Specification of Letters Eatent.

Patented Sept. 16, 1913.

Application filed November 12, 1912. Serial No. 730,853.

To all whom it may concern.

Be it known that I, JOHN J. Ansonm- Mann, a citizen of the United States, and a resident of Monroe, in the county of Green and State of Wisconsin, have invented a new and Improved \Vrench, of which the following is a full, clear, and exact description.

My invention relates to wrenches having means for eil'ecting a quick adjustment of the movable jaw, and involving a pivoted member appurtenant to the movable jaw within the shank of the fixed aw, normally tending under the action of a spring, to interlock with the said shank at the interior, and provided with a thumb piece or push member extending to the exterior for convenience in disengaging the loekin g member of the movable jaw, and permitting of the latter being adjusted toward or from the fixed jaw.

It is a design of my invention to provide a novel arrangement of locking member so formed and so disposed relatively to the other elements, as to promote convenience and effectiveness of operation.

It is also a design of the invention to provide a strong and simple construction .involving a minimum cost in manufacture.

The invention has furthermore for its design, to provide an improved locking means which, while applicable to wrenches having jaws of the type of the common monkey wrench, also lends itself very particularly to en'ibodiment in a combined nut and pipe wrench in which the jaws are permitted a relative transverse movement in opposite directions to grip the pipe, in addition to an adjustment toward and from each other, the transverse movement being obtained Without interference with the locking and ad justing means.

The invention is also designed to provide a locking means of the indicated character having a releasing push or thumb piece dis posed adjacent to the handle of the wrench to give convenient and perfect control by the one hand operating the wrench, while at the same time the pressure on the push or thumb piece is exerted through a long leverage.

The distinguishing features of my invention, and the important structural elements characterizing the preferred embodiments which are illustrated as examples, will be more particularly explained in the specific description hereinafter to be given.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of refer ence indicate corresponding parts in all the views.

Figure 1 is a sectional side elevation of a combined nut and pipe wrench embodying my invention; Fig. 2 is a sectional plan view; and Fig. 3 is a sectional side elevation showing the invention embodied in a wrench having jaws similar to a common monkey wrench.

Referrin particularly to the embodiment illustrated in Figs. 1 and 9, the fixed jaw 10 is formed on a shank 11 having a handle 12, and the said shank is chambered to receive the shank or slide 15.3 of the movable jaw 14, the fixed jaw having an opening 15 therethrough leading to the chamber 16 of the shank 11. The inner end of the slide 13 of the movable jaw has pivoted thereto, as at 17, the forward end of an elongated locking member 18, which is formed with ratchet teeth 19 or their equivalent adapted to engage with mating teeth 90 on the interior of the shank 11, on a wall of a rearward eX- tension 16 of the chamber 16. The clongated locking member 18, it will be observed, forms a reaiwvawl extension of the slide 13, extending as it does from the pivot- 17 rearwardly in the direction of the handle 12, and on the rear end of said locking memher is formed a thumb piece or push 18, of any convenient form to receive the pressure of the thumb or finger of the operator. The said thumb piece 18 is formed on a laterally cxtending arm 18" of the locking member '18, which projects outward from the rearward extension 10 of the shank chamber through an elongated slot 21, the said slot permitting the thumb piece to be pressed inward to disengage the teeth 19 and 20 from each other, and also to permit the locking member 18 to be slid longitudinally of the shank 11.

A spring 22, desirably in the form of a plate spring presses against the back of the locking member 18, and norn'lall y tends to engage the teeth 1.) thereof with the teeth 20. Said spring is secured by a screw 23 or V tially the full area of the chamber 16, so

its equivalent, to the slide 1-3 forward of the thei'ebetween the pivoted end 18 of the locking member 18. The plate spring 22 is contracted to be received between the cheeks 25', as indicated at 22, the said spring being broadened rearward of the cheeks 25 to insure a proper bearing against the locking member 18, and also broadened at the securing end which is held by the screw 23.

It will be observed from Fig. 1, that the size of the opening 15 leading through the fixed jaw 10 is sufiiciently larger than the slide 13 of the movable jaw to permit a rela tively lateral movement of the jaws 1n opposite directions transverse to the longitudinal axis of the wrench, for the effective gripping of a pipe, the jaws being serrated as at 10", 14 toassist the gripping action. The rear end of the slide 13, however, at the cheeks 25, is widened to occupy substanthat in the relative transverse movement of the jaws, the movable jaw 14 rocks relatively to the fixed aw, with the pivot 17 or outer surfaces of the cheeks 25 as the center of movement. It will be seen, moreover, that the transverse movement of the movable jaw is independent of the locking member 18 and does not interfere with the latter; therefore the making of the locking member in the form of a rearward pivoted extension of the slide or shank 13 of the movable aw, serves a three-fold purpose, to wit, the push or thumb piece 18 is disposed conveniently to the handle 12, the leverage in releasing the locking member is exerted through the long arm extending to the pivot 17 and the pivotal connection between the locking memher and the slide 13 permits of the transverse gripping movement of the movable jaw, without aflecting the locking member.

In the form shown in Fig. 3, the fixed jaw 10" and the movable jaw 14* are similar to the jaws of the common type of monkey wrench. The shank 11 is formed the same as in the construction shown in Figs. 1 and 2, having the chamber 16, 16 the slot 21 and the teeth 20; also the. locking member 18 with its lateral arm 18 and the push or thumb piece 18 are the same as previously described, the locking member being provided with the same arrangement of teeth 19 toengage the teeth 20. The slide 13 of the movable jaw 14 is recessed or forked at the rear end, as at 25*, to receive the forward end 18 of the locking member 18, and a pivot pin 17 secures the locking member to the slide 13 in the slotted rear end 25 A plate spring 22 7 of the slide 13 adjacent to the pivot 17 and bears at its rear end against the back of the locking member 18, to normally press the said member into engagement with' the teeth 20.

In the form shown in Fig. 3, the opening 15 extending from the chamber 16 through the fixed jaw 10*, is of a size only sutlicient is secured to the rear end to permit the longitudinal movement of the V shank 13 of the movable jaw 14", since with a nut wrench there is no necessity for any relative transverse movement of the jaws as in the case of a pipe wrench. In both forms of the wrench it will be seen that the locking member forms a rearward extension of the slide or shank of the movable jaw, and provides a long leverage arm and the convenient location of the push or thumb piece of the'locking member.

Having thus described my invention, 1' 2 claim as new, and desire to secure by Letters Patent 1. A wrench, comprising a fixed jaw having a handled shank formed with an in-- I terior chamber, an opening'at the front and side opening near the handle, both openings communicating with the chamber, a movable jaw having a shank loosely fitting the front opening to rock therein, and formed with an enlarged inner end snugly fitting between the walls of the chamber, a locking device pivoted to the said end of the movable jaw and extending at its rear end outwardly through the side opening in the shank of the fixed jaw, and a spring secured to the shank of the movable jaw and bearing on the back of the locking device.

2. A wrench comprising a fixed jaw having a handled shank formed with a longitudinal chamber and with an opening extending through said jaw, in communication with the chamber, a movable jaw provided with a shank sliding in said opening and tudinally, a push member on the locking device, at the rear end, extending laterally through the slot of the fixed shank, and a spring carried by the shank of the movable jaw and bearing against the back of the locking device, said spring being of reduced width adjacent to the end of the-movable shank and said movable shank being slotted presenting widened cheeks between which the reduced portion of the spring and the pivoted end of the locking device are 113- name to this specification in the presence of eelved, the shank of the movable aw tnrtwo subscribing witnesses.

thermore being rockable transversely in the w t T opening of the fixecl aw and relatively to the JOHN AIMSCHLIMANA' 5 locking device Without affecting the locking; WVitnesses:

action of said clev1ce. JonN STRAILM, In testnnony whereof I have signed my J. B. OMEARA.

flopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). C. 

